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(No Model.) y 2 Sheets-Sheet 1. D. W. PARKER 8v L. P. GRISWOLD.

EXTENSION LAMP FIXTURE.

Patented July 24, 1888.

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D. W. PARKER 8u L. F. GRISWOLD. v

EXTENSION LAMP FIXTURE.

No. 282,028. Patented July 24, 1883.

,of W Q @www l y www UNITED STATES PATENT OFFICE.

DEXTER W PARKER AND LEWIS F; GRISVOLD, OF MERIDEN, CONNECTICUT, ASSIGNORS TO THE CHARLES'PARKER COMPANY, OF SAME PLACE.

EXTENSION LAMP=FIXTURE.

SPECIFICATION formingpart of Letters Patent No. 282,028, dated July 24, 1883.

Application filed April`26. 1883 To all whom it may concern:

Be it known that we, DEXTER W. PARKER and LEWIs F. GRISWOLD, citizens of the United States, residing at Meriden, in the county of New I-Iaven and State of Connecticut, have invented certain new and useful Improvements in Extension Lamp-Fixtures; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will 1o enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

I 5 `This invention relates to extension lamp-nxtures, some parts ofl it being also applicable to chandelier-fixtures.

It consists, partly, in certain devices for attaching a lamp-harp to its suspending-rod or 2o a chandelier-fixture to its ceiling-hook; partly in attaching a lamp-shade to the side bars of alamp-harp, and in the means employed therefor; partly in the combination of the movable supporting-rod with a fixed tube, which has 2 5 on its lower end a collar'that fits said rod, and a weight which is sleeved on said tube and counterbalances said rod and the devices suspended thereby; partly in certain devices attached to the chains for preventing the latter from jarring against the tube or the weight and shade-ring from jarring against each other; and, nally, in certain additional improvements, all as hereinafter particularly set forth and claimed.

3 5 In the accompanying drawings, Figure l represents a side elevation, partly in section, of an extension-lamp and its iixtures embodying our invention, Fig. 2 represents a plan View of the upper part of a lamp-shade and our improved clamps for attaching it to the side bars of a lamp-harp, these side bars being shown inhorizontal section. Fig. 3 represents a detail perspective View of one of said clamps, with the proximate parts of the shade and the side bar of the lamp-harp to which it is at' tached. Fig. 4 represents aA detail perspective view of the hook for suspending `the lampharp and the movable lug attached to said hook for preventing the accidental dislodgment of said harp. Eig. 5 represents in detail a similar hook adapted to be screwed into (No model.)

a ceiling and used for suspending a chandelierfixture, the lug being shown in place and also as detached. Fig. 6 represents avertical section of Eig. l through the lower part of the suspending rod and tube, the collar on the lower end of the latter, the hook, movable lug, and the top bar of the-lainp-harp. Fig. 7 represents a detail view of a part of the suspending-rod and the collar through which it passes; and Fig. 8 represents a side elevation of a suspension lamp-iixture using the crown-shaped Astyle of counterbalance-weight, and provided with rubber stops arranged to strike against the canopy, and thereby prevent thewcight V` and shade-ring from jarring together.

In said drawings, A-designates .the canopy of an extension lamp-fixture; B, the pulleys which turn therein; C, a stationary tube, removably attached at its upp end to said canopy; D, a suspension-rod which is movable up and downin said tube; and E, the'suspensionchains which are connected at one end to said rod and at the other'(after passing over said pulleys respectively) to a weight, F, which slidesup and down on said tube. The lower end of rod D is provided wfitl a hook, G, which supports a lamp-harp, lI, in which rests a lamp, I.

The lamp-shade J is secured directly to the harp II by means of two clamps, K, each of which is provided with two downwardly-extending and inwardly-turned.hooks, k k, adapted to catch into the neck of said shade, under the projecting upper rim of the same. Each 8 5 clamp K is further provided with an inwardly-extending screw-threaded stem or'bolt, K', which passes through one of the side bars, h., of harp'H, and receives a thumb-nut, L, on its inner end, whereby the hooks lc are drawn against the shade. Each clamp K is also provided at its sides with two rigid arms, K, which extend inward parallel to bolt K on eachside of the side bar, h, to which it is applied. These arms effectually guard the clamp 9 5 against turning and keep it level. As these clamps are attached directly to the respective side bars of the lamp-harp they make a shadering unnecessary. The harp extends considerably above them, and is directly attached to 10o the.` suspension rod, as before stated. The hooks 7c of the two clamps hold the lamp-shade at four different points, and thereby prevent it from rocking. These clamps may be used when a ring-shaped weight is employed. In this case the harp does not extend above them, or, at least, not to any considerable degree, and the ring-shaped weight is therefore allowed to come down nearly to the upper edge ofthe shade, so as to appear like a crown therefor. The harp does not extend above this crown.

To prevent the harp H from being accidentally detached from hook G, and to hold it steady therein, we pivot on rod D, just above said hook, a horizontally-turning lug, M,whieh is bent so that it is adapted to close the opening of said hook, and provided with an inwardly-extending tip, m. This tip, when the said lug is turned in one direction, enters the mouth or opening g of said hook, and extends over the top bar, h, of the lamp-harp H, as shown in Fig. 6, so as to lock it against rattling. When the lamp is to be detached, the lug M is turned by hand, so as to free the top bar, h, and open the mouth g. The clamps K are then loosened, the harp removed from hook G, and the lamp and shade removed from the lamp. Vhile the lug M is in position to close the hook, as shown in Fig. 6, its tip m prevents the top bar, 7L, of the lamp-harp H from rising or rattling when it is pushed upward to change the height of the lamp. In Fig. 5 the hook M is shown somewhat larger, and prof vided with a screw-threaded shank, whereby it is attached to a ceiling in the usual manner. The form of the hook is also somewhat changed to fit it for receiving the upper loop of'a chandelier-iixture which isY suspended thereby. The operation of the lug m in this figurey is substantially as hcreinbei'ore described.

On the lower end of tube C a cap or collar, N, is firmly though removably attached, having a central opening, n, which closely fits the suspension-rod D. This collar, in combination with the iixed tube C, to which it is fastened, and the chains connecting the rod and weight, prevents the swaying of the rod and the lamp. If the opening in the collar N were appreciably greater than the rod D, said rod would sway more or less back and forth within said opening, but as constructed the direct action of the fixed tube is to prevent the motion of the lower part of rod D, while the upper end of said rod is held vertical by the chains, weight, and tube. The weight of course tends to prevent said rod from tilting; and if the motion of the rod be sufficient to overcome the resistance of said weight the iixed tube C checks the motion of the latter,

and therefore holds the upper end of said rod stationary. The lamp will therefore be held perfectly steady.

O designates rings, which are formed with or secured in the suspension-chains E, and act as stops to limit the downward motion of said lamp.

P are blocks or pads of india-rubber, which are secured to said-chain above said rings or stops, and prevent the latter from striking against the under side of the canopy, besides preventing the chains from rattling against tube C. As illustrated in Fig. 8, these blocks or pads P may be used with that kind of extension lamp-iixture in which a crown-shaped or ri 11g-shaped weight is employed. This form of weight has hitherto been made' to descend on the shade-ring, and rubber pads or blocks have been attached to the top of the latter to lessen the shock and preserve the shade from fracture. Such pads are, however, easily detached and answer their purpose imperfectly. Our rubber pads are arranged to come into contact with the canopy before the weight can quite reach the shade, and they thus prevent the said parts from `jarring together. They may also be used, when no shade-ring is employed, to prevent the weight from jarring against the top of the shade, which is clamped to the side bars of the lamp-harp.

The collar on the lower end of fixed tube G and thesuspensioirrod D, which iits said collar, may be used with the crown-shaped weight, &c. The tube C is not absolutely indispensable, for the collar N may be attached to rigid rods or frame-work forming part of the lampfixture. y

The stops or blocks I, of rubber, cannot be detached from the chains E, and hence have a decided advantage over pads superiicially attached to a shade-ring. They may, however, be iirmly attached to the canopy instead.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1..,In combination withthe harp or support ing-loop of a lamp or chandelier, a hook, G, adapted to receive the same, and provided with a piece, M, which is pivoted on the shank, above the open part of said hook, provided with a depending portion, and arranged to ft into and close or uncover the opening thereof, according to the position into which it is turned, substantially as set forth.

2. A suspension-hook provided with a pivoted bent lug having an inwardly-extending tip arranged toY extend over the top bar of a lamp-harp and hold the latter in its place in ysaid hook, substantially as set forth.

3. The clamps K, each of which is provided with a screw threaded shank, K, and two downwardly-extending hooks, k, adapted to said shade, substantially as set forth.

4. A clamp for a lamp-shade, provided with two rigid arms, K2, which extend inward, in

, combination with an upright part of a lampsupport, which prevents said clamp from turning, substantially as set forth.

5. In combination with a iixed tube having a collar at its lower end, a suspension-rod of less diameter than said tube, movable up and down in said collar and ntting the same, a

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Iamp-harp suspended from said rod7 and a weight and connecting-chains for counterbalanoing the rod7 harp, and lamp, substantially as set forth.

6. In combination with a fixed tube having a collar at its lower end, a suspension-rod of less diameter than said tube7 which fits the opening` in said collar and slides up and down therein, a counterbalance-weight which surrounds said tube and slides up and down thereon, chains which extend from said rod to said weight, and means for attaching,1 a lamp harpl 01'v support to said rod7 substantially as set forth.

7. In combination with the shade-ring1 weight7 canopy7 and chains of an extension- ]amp, rubber pads interposed between the canopy and stops on the chains to prevent the weight from coming into Contact with the other parts, substantially as set forth.

8. In an extension lamp-fixture, the co1nbi- 

